Here is a list of all variables with links to the structures/unions they belong to:

- $ -

$_analyzed : PEAR_Downloader_Package
$_archiveFile : PEAR_PackageFile_v1, PEAR_PackageFile_v2
$_arcs : Structures_Graph_Node
$_cache : PEAR_DependencyDB
$_channelInfo : PEAR_ChannelFile
$_class : PEAR_Task_Postinstallscript
$_compat : PEAR_ErrorStack
$_compress : Archive_Tar
$_compress_type : Archive_Tar
$_config : PEAR_ChannelFile_Parser, PEAR_Dependency2, PEAR_DependencyDB, PEAR_Downloader_Package, PEAR_PackageFile, PEAR_PackageFile_Parser_v1, PEAR_PackageFile_Parser_v2, PEAR_PackageFile_v2, PEAR_Registry
$_contents : PEAR_Task_Postinstallscript
$_contextCallback : PEAR_ErrorStack
$_currentPackage : PEAR_Dependency2
$_curState : PEAR_PackageFile_v2_Validator
$_data : Structures_Graph_Node
$_dataStack : PEAR_XMLParser
$_debug : PEAR, PEAR_PackageFile
$_default_error_handler : PEAR
$_default_error_mode : PEAR
$_default_error_options : PEAR
$_defaultOptions : PEAR_PackageFile_Generator_v2
$_depdb : PEAR_DependencyDB
$_dependencyDB : PEAR_Registry
$_dependencydb : PEAR_Dependency2
$_deps_rel_trans : PEAR_Command_Common
$_deps_type_trans : PEAR_Command_Common
$_depth : PEAR_XMLParser
$_directed : Structures_Graph
$_docChannel : PEAR_Registry
$_downloadDeps : PEAR_Downloader_Package
$_downloadDir : PEAR_Downloader
$_downloadedPackages : PEAR_Downloader, PEAR_Installer
$_downloader : PEAR_Downloader_Package
$_downloadURL : PEAR_Downloader_Package
$_error_class : PEAR
$_errorCallback : PEAR_ErrorStack
$_errorMsgs : PEAR_ErrorStack
$_errors : PEAR_ErrorStack
$_errorsByLevel : PEAR_ErrorStack
$_errorStack : PEAR_Downloader
$_expected_errors : PEAR
$_explicitGroup : PEAR_Downloader_Package
$_explicitState : PEAR_Downloader_Package
$_extractErrors : PEAR_PackageFile
$_failures : PEAR_Validate
$_file : Archive_Tar
$_filesValid : PEAR_PackageFile_v2, PEAR_PackageFile_v2_Validator
$_firstline : PEAR_Builder
$_fmt : Archive_Tar
$_graph : BasicGraph, Structures_Graph_Node
$_headers : PEAR_RunTest
$_ignore_regexp : Archive_Tar
$_incomplete : PEAR_PackageFile_v1, PEAR_PackageFile_v2
$_installed : PEAR_Downloader
$_installRegistry : PEAR_Downloader_Package
$_internalDownload : PEAR_Downloader
$_isValid : PEAR_ChannelFile, PEAR_PackageFile_v1, PEAR_PackageFile_v2, PEAR_PackageFile_v2_Validator
$_lastline : PEAR_Builder
$_lockfile : PEAR_DependencyDB
$_lockFp : PEAR_DependencyDB
$_logger : PEAR_ChannelFile_Parser, PEAR_ErrorStack, PEAR_PackageFile, PEAR_PackageFile_Parser_v1, PEAR_PackageFile_Parser_v2, PEAR_PackageFile_v1, PEAR_PackageFile_v2, PEAR_RunTest
$_metadata : Structures_Graph_Node
$_mirrorIndex : PEAR_ChannelFile
$_msgCallback : PEAR_ErrorStack
$_nodes : Structures_Graph
$_obj : PEAR_Task_Postinstallscript
$_observers : PEAR_Exception
$_options : PEAR_Dependency2, PEAR_Downloader, PEAR_REST, PEAR_RunTest
$_os : PEAR_Dependency2
$_package : PEAR_ErrorStack
$_packageFile : PEAR_PackageFile_v1, PEAR_PackageFile_v2
$_packagefile : PEAR_Downloader_Package, PEAR_PackageFile_Generator_v1, PEAR_PackageFile_Generator_v2
$_packageInfo : PEAR_PackageFile_v1, PEAR_PackageFile_v2, PEAR_PackageFile_v2_Validator
$_packageSortTree : PEAR_Downloader
$_packagexml : PEAR_Validate
$_params : PEAR_Task_Postinstallscript
$_parsed_configure_options : PEAR_Builder
$_parsedname : PEAR_Downloader_Package
$_pearChannel : PEAR_Registry
$_peclChannel : PEAR_Registry
$_pf : PEAR_PackageFile_v2_Validator
$_php : PEAR_RunTest
$_pkg : PEAR_Task_Postinstallscript, PEAR_Task_Postinstallscript_rw
$_preferredState : PEAR_Downloader
$_rawpackagefile : PEAR_Downloader_Package
$_rawReturn : PEAR_PackageFile
$_registry : PEAR_ChannelFile_Parser, PEAR_Command_Common, PEAR_Dependency2, PEAR_DependencyDB, PEAR_Downloader, PEAR_Downloader_Package, PEAR_PackageFile_Parser_v1, PEAR_PackageFile_Parser_v2, PEAR_PackageFile_v1, PEAR_PackageFile_v2, PEAR_Packager
$_replacements : PEAR_Task_Replace, PEAR_Task_Unixeol, PEAR_Task_Windowseol
$_requestedGroup : PEAR_PackageFile_v2
$_rest : PEAR_REST_10, PEAR_REST_11
$_root : PEAR_XMLParser
$_savephp : PEAR_RunTest
$_separator : Archive_Tar
$_serializedData : PEAR_PackageFile_Generator_v2
$_stack : PEAR_ChannelFile, PEAR_PackageFile_v1, PEAR_PackageFile_v2, PEAR_PackageFile_v2_Validator
$_state : PEAR_Dependency2, PEAR_Validate
$_subchannelIndex : PEAR_ChannelFile
$_supportedVersions : PEAR_ChannelFile
$_tagDepth : PEAR_PackageFile_Generator_v2
$_tarname : Archive_Tar
$_tasksNs : PEAR_PackageFile_v2
$_temp_tarname : Archive_Tar
$_toDownload : PEAR_Downloader
$_trace : PEAR_Exception
$_type : PEAR_Downloader_Package
$_uniqueid : PEAR_Exception
$_unserializedData : PEAR_XMLParser
$_v2Validator : PEAR_PackageFile_v2
$_valid : PEAR_Downloader_Package
$_validated : PEAR_Downloader_Package
$_validPackageFile : PEAR_Common
$_valStack : PEAR_XMLParser
$_version : PEAR_DependencyDB
$accessLog : BinApache
$admin : BinMariadb, BinMysql
$allowedArchiveExtensions : QuickPick
$altConf : BinPostgresql
$altHbaConf : BinPostgresql
$apache : Bins
$apacheConf : BinPhp
$asyncEnabled : Log
$asyncQueueDir : Log
$backtrace : PEAR_Error
$bash : ToolGit
$bearsamppConf : Module
$bearsamppConfRaw : Module
$bearsamppSplash : ActionSwitchVersion
$bin : ActionChangeDbRootPwd, ActionChangePort, ActionSwitchVersion
$binPath : Nssm, Win32Service
$bivalentMethods : PEAR, PEAR_Downloader
$boxTitle : ActionSwitchVersion
$bruno : Tools
$buffer_length : Archive_Tar
$cacheDir : CacheManager
$cacheIntegrityKey : Cache
$callback : PEAR_Error, WinBinder
$cause : PEAR_Exception
$changePort : ActionSwitchVersion
$channels : PEAR_Registry
$channelsdir : PEAR_Registry
$classMap : Autoloader
$cliExe : BinMariadb, BinMysql, BinPhp, BinPostgresql
$cliSilentExe : BinPhp
$cntProcessActions : ActionChangeDbRootPwd, ActionChangePort
$code : PEAR_Error
$cols : ToolPowerShell
$commands : PEAR_Command_Auth, PEAR_Command_Build, PEAR_Command_Channels, PEAR_Command_Config, PEAR_Command_Install, PEAR_Command_Mirror, PEAR_Command_Package, PEAR_Command_Pickle, PEAR_Command_Registry, PEAR_Command_Remote, PEAR_Command_Test
$composer : Tools
$conf : AppPhpmyadmin, AppPhppgadmin, BinApache, BinMariadb, BinMysql, BinNodejs, BinPhp, BinPostgresql, ToolPowerShell
$config : PEAR_Command_Common, PEAR_Common, PEAR_Installer_Role_Common, PEAR_Proxy, PEAR_REST, PEAR_Task_Common
$configCache : Module
$consoleExe : ToolRuby
$corePath : Path
$countCtrls : WinBinder
$cpu : OS_Guess
$ctlExe : BinPostgresql
$current : Action, LangProc
$current_attributes : PEAR_Common
$current_callback : PEAR_Builder
$current_element : PEAR_Common
$current_path : PEAR_Common
$currentImg : Splash
$currentPath : Module
$currentPort : ActionChangePort
$currentVersion : ActionCheckVersion, ActionSwitchVersion
$dataDir : BinMysql
$debug : PEAR_Installer
$defaultTitle : WinBinder
$didStartLoading : ActionCheckVersion
$displayName : Nssm, Win32Service
$docdir : PEAR_Installer
$dumpAllExe : BinPostgresql
$dumpExe : BinPostgresql
$element_stack : PEAR_Common
$enable : Module
$enabled : CacheManager, FiberModuleLoader
$encoding : PEAR_XMLParser
$environmentExtra : Nssm
$error : ActionStartup
$error_message_prefix : PEAR_Error
$error_object : Archive_Tar
$errorControl : Win32Service
$errorLog : BinApache, BinMariadb, BinMysql, BinPhp, BinPostgresql
$exe : BinApache, BinMailpit, BinMariadb, BinMemcached, BinMysql, BinNodejs, BinXlight, ToolBruno, ToolComposer, ToolGhostscript, ToolGit, ToolNgrok, ToolPerl, ToolPowerShell, ToolPython, ToolRuby
$exeConsole : ToolGhostscript
$extdir : PEAR_Installer
$extensions_built : PEAR_Builder
$extra : OS_Guess
$failedLookups : Autoloader
$fiber : FiberModule
$fibers : FiberModuleLoader
$file_operations : PEAR_Installer
$filemap : PEAR_Registry
$filemap_cache : PEAR_Registry
$fileScanCache : Cache
$fileScanCacheDuration : Cache
$fileScanStats : Cache
$filesToScan : ActionStartup
$firefoxTrustDeclinedFile : OpenSsl
$gauge : WinBinder
$ghostscript : Tools
$git : Tools
$githubLatestVersionUrl : ActionCheckVersion
$hbaConf : BinPostgresql
$id : Module
$idleExe : ToolPython
$ini_overwrites : PEAR_RunTest
$initClassCounts : Log
$initialized : FiberModule
$initValue : ActionDialogBase
$installer : PEAR_Installer_Role_Cfg
$installphase : PEAR_Task_Common
$installroot : PEAR_Installer
$isRoot : Root
$jsonFilePath : QuickPick
$latestError : Nssm, Registry, Win32Service
$latestStatus : Nssm, Win32Service
$latestVersion : ActionCheckVersion
$launch : BinNodejs
$launchExe : ToolPowerShell
$level : PEAR_Error
$listen : BinMailpit
$loading : ModuleLoader
$lock_fp : PEAR_Registry
$lock_mode : PEAR_Registry
$lockfile : PEAR_Registry
$log : BinMailpit, BinMemcached, BinXlight
$logBuffer : Log
$logBufferSize : Log
$loggedFunctions : Win32Service
$logger : PEAR_Task_Common
$logs : ActionExt
$logStats : Log
$lp : PEAR_Frontend_CLI
$mailpit : Bins
$mariadb : Bins
$maxAsyncQueueBatch : Log
$maxWaitTime : ModuleLoader
$md5 : PEAR_Installer_Role_Cfg
$memcached : Bins
$memory : BinMemcached
$message : PEAR_Error
$mode : PEAR_Error
$moduleName : FiberModule
$modules : ModuleLoader, QuickPick
$modulesPath : BinApache
$mysql : Bins
$name : Module, Nssm, Win32Service
$ngrok : Tools
$nodejs : Bins
$nodename : OS_Guess
$npm : BinNodejs
$nssm : Win32Service
$opensslExe : BinApache
$options : PEAR_PackageFile_Generator_v2
$output : PEAR_Command_Package, PEAR_Command_Test
$packageregex : PEAR_Validate
$page : Homepage
$pageList : Homepage
$params : Nssm, PEAR_Frontend_CLI, Win32Service
$path : Root
$pathFormatCache : Path
$pathFormatCacheMaxSize : Path
$pathFormatStats : Path
$pathsToScan : ActionSwitchVersion
$pearExe : BinPhp
$perl : Tools
$phase : PEAR_Task_Common, PEAR_Task_Postinstallscript, PEAR_Task_Replace, PEAR_Task_Unixeol, PEAR_Task_Windowseol
$php : Bins
$php_api_version : PEAR_Builder
$phpdir : PEAR_Installer
$phpmyadmin : Apps
$phppgadmin : Apps
$pkgdir : PEAR_Installer
$pkginfo : PEAR_Common
$pkginfo_cache : PEAR_Registry
$port : BinApache, BinMariadb, BinMemcached, BinMysql, BinPostgresql, BinXlight
$postgresql : Bins
$powershell : Tools
$processed : ActionRestartAllServices, ActionStartAllServices, ActionStopAllServices
$procs : Root
$procsLoaded : Root
$proxy_host : PEAR_Proxy
$proxy_pass : PEAR_Proxy
$proxy_port : PEAR_Proxy
$proxy_schema : PEAR_Proxy
$proxy_user : PEAR_Proxy
$python : Tools
$raw : Config, LangProc
$registry : PEAR_Installer, PEAR_Task_Common
$release : Module, OS_Guess
$reloadClassCounts : Log
$repos : ToolGit
$reposCacheFile : ToolGit
$reposFile : ToolGit
$restart : ActionStartup
$result : FiberModule
$rewriteLog : BinApache
$root : Symlinks
$rootCaName : OpenSsl
$rootPath : ActionStartup, Module, Path
$rootPwd : BinMariadb, BinMysql, BinPostgresql
$rootUser : BinMariadb, BinMysql, BinPostgresql
$rows : ToolPowerShell
$ruby : Tools
$scanStartup : ToolGit
$service : ActionSwitchVersion, BinApache, BinMailpit, BinMariadb, BinMemcached, BinMysql, BinPostgresql, BinXlight
$serviceListCache : Win32Service
$serviceMap : ServiceHelper
$shutdownRegistered : Log
$silentMode : Log
$skipSymlinkCreation : Symlinks
$smtpPort : BinMailpit
$splash : ActionQuit, ActionRestartAllServices, ActionStartAllServices, ActionStartup, ActionStopAllServices
$sslConf : BinApache
$SslPort : BinXlight
$sslPort : BinApache
$start : Nssm
$startTime : ActionStartup
$startType : Win32Service
$statedir : PEAR_Registry
$stats : Autoloader, CacheManager
$status : ActionExt
$stderr : Nssm
$stdout : Nssm
$symlinkPath : Module
$syntaxCheckMap : ServiceHelper
$sysname : OS_Guess
$term : PEAR_Frontend_CLI
$tests_count : PEAR_RunTest
$timeout : FiberModule
$tmpdir : PEAR_Installer
$trustPromptShownThisRun : OpenSsl
$type : Module, PEAR_Frontend_CLI, PEAR_Task_Common, PEAR_Task_Postinstallscript, PEAR_Task_Replace, PEAR_Task_Unixeol, PEAR_Task_Windowseol
$ui : PEAR_Command_Common, PEAR_Common
$uiPort : BinMailpit
$userinfo : PEAR_Error
$vars : BinNodejs
$version : ActionSwitchVersion, Module
$versions : QuickPick
$wbBtnBrowse : ActionChangeBrowser
$wbBtnCancel : ActionChangeBrowser, ActionChangeDbRootPwd, ActionChangePort, ActionDialogBase, ActionGenSslCertificate
$wbBtnDelete : ActionDialogBase
$wbBtnDest : ActionAddAlias, ActionEditAlias, ActionGenSslCertificate
$wbBtnDocRoot : ActionAddVhost, ActionEditVhost
$wbBtnFinish : ActionChangeDbRootPwd, ActionChangePort
$wbBtnOk : ActionAbout, ActionCheckVersion
$wbBtnSave : ActionChangeBrowser, ActionDialogBase, ActionGenSslCertificate
$wbDelSslBtnCancel : OpenSsl
$wbDelSslBtnDelete : OpenSsl
$wbDelSslBtnDest : OpenSsl
$wbDelSslInputDest : OpenSsl
$wbDelSslListCerts : OpenSsl
$wbDelSslProgressBar : OpenSsl
$wbGenSslBtnCancel : OpenSsl
$wbGenSslBtnDest : OpenSsl
$wbGenSslBtnSave : OpenSsl
$wbGenSslInputDest : OpenSsl
$wbGenSslInputName : OpenSsl
$wbGenSslProgressBar : OpenSsl
$wbImage : ActionAbout, ActionCheckVersion, Splash
$wbInputBrowse : ActionChangeBrowser
$wbInputCurrentPwd : ActionChangeDbRootPwd
$wbInputDest : ActionAddAlias, ActionEditAlias, ActionGenSslCertificate
$wbInputDocRoot : ActionAddVhost, ActionEditVhost
$wbInputName : ActionAddAlias, ActionEditAlias, ActionGenSslCertificate
$wbInputNewPwd1 : ActionChangeDbRootPwd
$wbInputNewPwd2 : ActionChangeDbRootPwd
$wbInputPort : ActionChangePort
$wbInputServerName : ActionAddVhost, ActionEditVhost
$wbLabel : ActionLoading
$wbLabelCurrent : ActionChangePort
$wbLabelCurrentPwd : ActionChangeDbRootPwd
$wbLabelDest : ActionAddAlias, ActionEditAlias, ActionGenSslCertificate
$wbLabelDocRoot : ActionAddVhost, ActionEditVhost
$wbLabelExp : ActionAddAlias, ActionAddVhost, ActionChangeBrowser, ActionEditAlias, ActionEditVhost
$wbLabelName : ActionAddAlias, ActionEditAlias, ActionGenSslCertificate
$wbLabelNewPwd1 : ActionChangeDbRootPwd
$wbLabelNewPwd2 : ActionChangeDbRootPwd
$wbLabelPort : ActionChangePort
$wbLabelServerName : ActionAddVhost, ActionEditVhost
$wbLinkChangelog : ActionCheckVersion
$wbLinkDonate : ActionAbout
$wbLinkFull : ActionCheckVersion
$wbLinkGithub : ActionAbout
$wbLinkHomepage : ActionAbout
$wbProgressBar : ActionChangeBrowser, ActionChangeDbRootPwd, ActionChangePort, ActionDialogBase, ActionGenSslCertificate, ActionLoading, Splash
$wbRadioButton : ActionChangeBrowser
$wbRadioButtonOther : ActionChangeBrowser
$wbTextLoading : Splash
$wbWindow : ActionAbout, ActionChangeBrowser, ActionChangeDbRootPwd, ActionChangePort, ActionCheckVersion, ActionDialogBase, ActionGenSslCertificate, ActionLoading, Splash
$webRoot : BinMailpit
$wmiCimv2 : Win32Native
$wmiStdRegProv : Win32Native
$wscriptShell : Win32Native
$xdebug_loaded : PEAR_RunTest
$xlight : Bins
$zend_extension_api_no : PEAR_Builder
$zend_module_api_no : PEAR_Builder